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January 17th, 2026 :: 6:02 pm CST   

Local Weather Report for
Decatur
Illinois, United States

 Current Decatur Weather Conditions Updated January 17th at 4:54 pm 
Partly Clear
Temperature:16°F Dew Point:1°F
Barometer:30.18 inHg Wind:N 26 Mph
Humidity:48.1% Visibility:0M
 
 Decatur Weather Forecast Summary  
 
Today
Jan 17th
Sunday
Jan 18th
Monday
Jan 19th
Tuesday
Jan 20th
Wednesday
Jan 21st
Cloudy Cloudy Cloudy Cloudy Cloudy
20°F
27°F
13°F
14°F
7°F
30°F
10°F
35°F
23°F
 
 Decatur Detailed Weather Forecast  
 
Saturday, January 17th, 2026
Evening Temperature: 16°F
Cloudy. Windy at times.
Sunday, January 18th, 2026
Overnight Temperature: 13°F
Clear with cloudy periods. Windy at times.
Morning Temperature: 21°F
Cloudy. Windy at times.
Afternoon Temperature: 27°F
Cloudy. Windy at times.
Evening Temperature: 21°F
Cloudy. Windy.
Monday, January 19th, 2026
Overnight Temperature: 10°F
Cloudy. Windy.
Morning Temperature: 10°F
Sunny with cloudy periods. Windy.
Afternoon Temperature: 12°F
Sunny. Windy at times.
Evening Temperature: 11°F
Clear.
Tuesday, January 20th, 2026
Overnight Temperature: 10°F
Clear.
Morning Temperature: 23°F
A mix of cloud and sun. Windy.
Afternoon Temperature: 29°F
Sunny. Windy.
Evening Temperature: 29°F
Cloudy. Windy.
Wednesday, January 21st, 2026
Overnight Temperature: 31°F
Cloudy. Windy.
Morning Temperature: 33°F
Cloudy. Windy at times.
Afternoon Temperature: 28°F
Cloudy.
Evening Temperature: 25°F
Cloudy. Windy at times.
Thursday, January 22nd, 2026
Overnight Temperature: 22°F
Cloudy.
Morning Temperature: 29°F
Sunny. Windy at times.
Afternoon Temperature: 29°F
Sunny.
Evening Temperature: 29°F
Cloudy. Windy at times.
Friday, January 23rd, 2026
Overnight Temperature: 28°F
Cloudy. Windy at times.
Morning Temperature: 33°F
Cloudy.
Afternoon Temperature: 27°F
Cloudy. Windy at times.
Evening Temperature: 21°F
Cloudy. Windy at times.
Saturday, January 24th, 2026
Overnight Temperature: 19°F
Cloudy. Windy at times.
Morning Temperature: 21°F
Cloudy. Windy.
Afternoon Temperature: 20°F
Cloudy with flurries likely. Windy at times.
Evening Temperature: 20°F
Cloudy with a few flurries. Windy at times.
Sunday, January 25th, 2026
Overnight Temperature: 14°F
Clear with cloudy periods.
Morning Temperature: 16°F
A mix of cloud and sun. Windy at times.
Afternoon Temperature: 12°F
Mostly sunny.
Evening Temperature: 11°F
Cloudy.





 

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4:55 PM  18°F
Overcast
 
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4:53 PM  16°F
Mostly Clear
 
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4:55 PM  16°F
Mostly Cloudy
 
Urbana, IL 
4:53 PM  16°F
Mostly Clear

 
This WeatherCity Weather Forecast for Decatur, Illinois, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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